/* 引入字体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@600;700&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css');
/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Noto Sans SC', sans-serif;
}
a{
  text-decoration: none;
}
.text-center{
  text-align: center;
}
/* CSS变量定义 */
:root {
  --primary-blue: #0d6efd;
  --dark-blue: #0a58ca;
  --deep-blue: #0d1b2a;
  --light-blue: #e6f0ff;
  --accent-teal: #0dcaf0;
  --white: #ffffff;
  --light-gray: #f8f9fa;
  --medium-gray: #e9ecef;
  --text-dark: #212529;
  --text-medium: #495057;
  --text-light: #6c757d;
  --success: #198754;
  --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  --gradient-blue: linear-gradient(135deg, #0d6efd, #0dcaf0);
}

body {
  background-color: var(--light-gray);
  color: var(--text-medium);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 基础卡片样式 */
.card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(13, 110, 253, 0.2);
}

/* 通用按钮样式 */
.btn {
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.btn-primary {
  background: var(--gradient-blue);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--primary-blue);
  border: 1px solid var(--primary-blue);
}

/* 页面通用标题 */
.section-header {
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}

.section-header .section-title {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 2.5rem;
  color: var(--primary-blue);
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
}

.section-header .section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--accent-teal);
  border-radius: 4px;
}

.section-header .section-subtitle {
  font-size: 1.1rem;
  color: var(--text-medium);
  max-width: 700px;
  margin: 30px auto 0;
}

/* 动画效果 */
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate {
  animation: fadeInUp 0.8s ease-out forwards;
}

.animate-float {
  animation: float 4s ease-in-out infinite;
}

.delay-1 {
  animation-delay: 0.2s;
}

.delay-2 {
  animation-delay: 0.4s;
}

.delay-3 {
  animation-delay: 0.6s;
}

/* 响应式工具类 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.mt-8 {
  margin-top: 2rem;
}

.ml-2 {
  margin-left: 0.5rem;
}


